Seattle Mariners @ Philadelphia Phillies Player Props, Picks and Predictions - 8/18/2025 6:45 PM EDT

We have your Seattle Mariners @ Philadelphia Phillies prop betting and game preview needs covered as the Seattle Mariners hit the road to face the Philadelphia Phillies.

Seattle Mariners @ Philadelphia Phillies Pick

Best Moneyline Odds: Philadelphia Phillies -105
Best Total Odds: Under 8.0 (-115)

Game Info

Date: 2025-08-18
Time: 6:45 PM EDT
Location: Citizens Bank Park
TV: -

Seattle Mariners @ Philadelphia Phillies Preview

The Philadelphia Phillies (71-53, 1st NL East) are set to host the Seattle Mariners (68-57, 2nd AL West) at Citizens Bank Park. The Phillies enter this contest with a 6-4 record over their last 10 games, showcasing a potent offense that averages 4 runs per game and ranks 5th in MLB in batting average. Their defense has been solid, limiting opponents to around 3.6 runs per match. Key offensive contributors like Alec Bohm, Bryce Harper, Nick Castellanos, and Trea Turner are expected to provide significant run support. However, the Phillies will be without Zack Wheeler, who is on the 15-Day-IL, and Carson Taylor and Christian McGowan are day-to-day.

On the other side, the Seattle Mariners have hit a recent skid, losing four of their last five games and holding a 5-5 record over their last 10. They average 4.2 runs per game but have seen their ERA climb to 5.83 in their last five outings. The Mariners have also struggled on the road this season, holding a 31-32 away record.

The pitching matchup features Logan Gilbert (3.31 ERA, 0.98 WHIP) for the Mariners against Ranger Suárez (3.28 ERA, 1.12 WHIP) for the Phillies. While Gilbert has been consistent, he holds an 0-3 record in his last three starts against the Phillies, surrendering an average of 3.0 earned runs per game. Suárez, despite a stellar first half, has stumbled recently, giving up 11 runs in his last two starts and holding a 1-4 record with a 6.11 ERA over his last six outings. Historically, Suárez has shown a tendency for second-half struggles, with a 6.06 ERA in 13 combined starts after the All-Star break over the last two seasons.

Historic Head-to-Head Stats and Analysis

The last encounter between these two teams was on August 4, when the Philadelphia Phillies secured a commanding 6-0 victory. In their head-to-head history, the Phillies have claimed 11 wins, with 4 of those coming at home. The Seattle Mariners are not far behind, boasting 13 victories, 7 of which were achieved on the road. When these two teams meet, the home team averages 3.8 runs per game, while the visiting team slightly edges them out with an average of 4.08 runs.

Pick: Under 8.0 Total Runs

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Despite Citizens Bank Park's reputation as a hitter-friendly venue, the strongest play for this matchup is the Under 8.0 total runs. Both Logan Gilbert and Ranger Suárez are consistent starting pitchers with impressive ERAs in the low 3.30s. Gilbert's elite 0.98 WHIP is particularly noteworthy, as it limits baserunners and scoring opportunities. Furthermore, both bullpens are well-rested and rank among the league's best, with Seattle holding a slight edge in overall bullpen performance (3.42 ERA) compared to Philadelphia (3.56 ERA). While the Phillies' offense has shown power, the quality of pitching on both sides, combined with rested relief corps, suggests a tightly contested, lower-scoring affair. We project a final score in the 3-2 or 4-3 range, making the Under 8.0 total runs the most compelling bet.

Top Player Prop Picks

Trea Turner Over 0.5 Hits

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Trea Turner has been in excellent form for the Philadelphia Phillies. He has hit the over on his hits prop in 100% of his last 5 games and 80% of his last 10 games. For the season, Turner boasts a 70.49% hit rate. When playing at home in 2025, he has been particularly effective, hitting the over 75.86% of the time. Given his recent hot streak and strong home performance, backing Turner to get a hit is a solid play.
Best Odds: Over 0.5 Hits (-235) at BetMGM

Alec Bohm Over 0.5 Hits

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Alec Bohm has consistently delivered for the Philadelphia Phillies, hitting the over on his hits prop in 80% of his last 15 games and maintaining a 74.19% hit rate for the season. Notably, Bohm has a perfect 100% hit rate against the Seattle Mariners in their 2024 matchups. His performance at Citizens Bank Park in 2025 has also been strong, hitting the over 77.27% of the time. These trends make the over on Bohm's hits prop an attractive option.
Best Odds: Over 0.5 Hits (-190) at Fanduel

Max Kepler Over 0.5 Hits + Runs + RBIs

Max Kepler, now with the Philadelphia Phillies, has shown strong offensive production recently, hitting the over on his Hits + Runs + RBIs prop in 80% of his last 5 games and 70% of his last 10 games. He has an exceptional record against the Seattle Mariners, hitting the over in 100% of their 2024 matchups, averaging 2.57 HRBIs in those contests. His season hit rate for this prop stands at 62.75%. Kepler's consistent performance and favorable historical matchup against the Mariners make this a compelling prop bet.
Best Odds: Over 0.5 Hits + Runs + RBIs (-160) at BetMGM

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